THERMAL PROBLEMS IN QUICK START AND RAPID LOAD INCREASE OF MARINE STEAM TURBINES AND BOILERS

Some series of tests of quick start and rapid load increase were carried out on naval steam turbines and boilers in their sea trials to improve their operational flexibilities. In the tests, the turbines were accelerated from 12 Knots speed to the maximum speed within 25 to 14 minutes, while the boilers were started up to their working pressure in 100 to 50 minutes. Thermal stresses at the horizontal flanges and the flange bolts of the turbine casings, relative expansion between the rotors and the casings were mainly measured on the turbines, and the superheater tube wall temperature, distortion of the water drum and the stress caused by the distortion on the boilers. In this paper, the results of the tests and the consideration of the authors derived from them are mentioned, including the method to minimize the thermal stress in turbine casings and the similarity of the thermal stress when the scale is changed.

• Corporate Authors:

  Society of Naval Architects of Japan

  23 Shiba-kotohiracho, Minato-ku
  Tokyo 135,   Japan 
• Authors:
  • Hamano, K
  • Yoshimi, Y
  • Ishihara, E
  • TAKEDA, Y
• Publication Date: 1970

Media Info

• Pagination: p. 13-22
• Serial:
  • Selected Papers, J of Soc of Naval Arch of Japan
  • Volume: 6
  • Publisher: Society of Naval Architects of Japan

Subject/Index Terms

• TRT Terms: Boilers; Electric power plants; Equipment tests; Performance; Reliability; Steam turbines; Testing
• Old TRIS Terms: Boiler testing; Power plant performance; Steam turbine testing
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00035191
• Record Type: Publication
• Source Agency: Society of Naval Architects of Japan
• Files: TRIS
• Created Date: Oct 27 1972 12:00AM